Evaluation of critical velocity employed to prevent the backlayering of thermal fume during tunnel fires

Qian Wang, Nobuyoshi Kawabata, Takuji Ishikawa

研究成果: Article査読

抄録

In this paper characteristics of backlayering of thermal fumes induced by emergency fires in tunnels is studied. The critical velocity used to prevent the thermal fume and smoke from backlayering upwind is firstly evaluated by this study using 3 dimensional LES turbulence model. Simulation result shows that under low heat release rate of fire, the critical velocity increases linearly when heat release rate increases, but this dependent relation will become weak under high heat release rate. Result also shows a supercritical velocity valued 2.5-2.7 m/s exists, which agrees to the conventional experimental studies.

本文言語English
ページ(範囲)911-918
ページ数8
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
67
656
DOI
出版ステータスPublished - 2001 4
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 機械工学

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